Browsing by Author "Simonsen, Sigrid Ina"

Simonsen, Sigrid Ina(Doctoral thesis, The University of Bergen, 2013-08-30)

This thesis is a theoretical study of the behavior of electrons in atoms and molecules
subjected to external electromagnetic fields. Three electronic systems have been central
in this work, the atomic and quasimolecular ...

We calculate, based on first-order perturbation theory, the total and differential ionization probabilities from
a dynamic periodic Rydberg wave packet of a given n-shell exposed to a train of femtosecond laser pulses. ...

We explore high-order harmonic generation (HHG) from a graphene sheet exposed to intense femtosecond
laser pulses based on the Lewenstein model. It is demonstrated that the HHG cutoff frequency increases with
graphene ...

We demonstrate a feature of the Rydberg blockade mechanism which occurs between two initially excited
circular Rydberg atoms. When both atoms are exposed to weak time-dependent electric fields, it is shown that
the ...

Simonsen, Sigrid Ina(Master thesis, The University of Bergen, 2010-06-10)

A study of the dynamics of excited hydrogenic atoms, with emphasis on analytical and numerical calculations of the time-independent and the time-dependent Schrõdinger equation. A short description of Rydberg atoms and their ...